/*
  @Author: tcly861204
  @Email:  356671808@qq.com
  @Date:   2021/12/26 上午9:08:11
  @Last Modified by:   tcly861204
  @Last Modified time: 2022/1/6 上午12:12:03
  @Github: https://tcly861204.github.io
*/
@include b(back) {
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  height: 45px;
  background: $bg01;
  z-index: 2;
  font-size: $f30;
  color: #fff;
  line-height: 45px;
  box-sizing: border-box;
  &__btn {
    display: block;
    position: relative;
    padding: 0 0 0 24px;
    width: 80px;
    height: 45px;
    &::before,
    &::after {
      position: absolute;
      content: '';
      left: 10px;
      width: 9px;
      height: 2px;
      background: #fff;
    }
    &::before {
      transform: rotate(-53deg);
      bottom: 24px;
    }
    &::after {
      transform: rotate(53deg);
      top: 24px;
    }
  }
}
